Finding the Fourth Proportional to 9,091,659.81, 12,546,784.12 and 5,171,315.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,091,659.81 : 12,546,784.12 = 5,171,315.20 : x
2. Step 2: Convert to fraction form
   9,091,659.81/12,546,784.12 = 5,171,315.20/x
3. Step 3: Cross multiply
   9,091,659.81x = 12,546,784.12 × 5,171,315.20
4. Step 4: Simplify right side
   9,091,659.81x = 64,883,375,396,275.59
5. Step 5: Solve for x
   x = 64,883,375,396,275.59/9,091,659.81
6. Step 6: Final answer
   x = 7,136,581.96